f75387 Feature Integration Technology Inc., f75387 Datasheet - Page 31

• Manufacturer Part Number: f75387
• Description: ?1o C Accuracy H/w Monitor Ic With Automatic Fan Speed Control
• Manufacturer: Feature Integration Technology Inc.

Power-on default [7:0] =0000_1111 b
Power-on default [7:0] =0101_0101 b
7-6
5-4
3-0
8.22. Filter Fast Update Value Register -- Index 67h
7-4
3-2
1-0
8.23. PWMOUT1 START UP DUTY-CYCLE  Index 69h
7-4
3-0
Bit
Bit
Bit
FAN_FULL_TIME
UPDATE_QUEUE2
UPDATE_QUEUE1
FAN2_MIN_DUTY
FAN1_MIN_DUTY
FAN2_TYPE
FAN1_TYPE
Name
Reserved
Name
Name
Attribute
Attribute
R/W
R/W
R/W
R/W
R/W
Attribute
R/W
R/W
-
00, 01: use Fintek application circuit to control fan speed by fan’s power
terminal .
10: use application circuit to control fan speed by fan’s GND terminal.
11: use Intel 4-wire fans.
00, 01: use Fintek application circuit to control fan speed by fan’s power
terminal
10: use application circuit to control fan speed by fan’s GND terminal 11: use
Intel 4-wire fans.
The keep full time when fan startup. The fan will keep full when power on
until the fan is detected enabled and count to the time programmed.
(0, means 1second. ; 1, means 2 seconds. ; 2. means 3 seconds …)
When fan starts, the PWMOUT2 will increase duty-cycle from 0 to this (value
x 8) directly. And if fan speed is down, the PWMOUT2 will decrease
duty-cycle to 0 when the PWM duty cycle is less than this (value x 4).
When fan starts, the PWMOUT1 will increase duty-cycle from 0 to this (value
Return 0 when read.
The queue time for second filter to quickly update values.
00: disable quick update function.
01: 16 times.(default)
10: 32 times.
11: 48 times.
The queue time for second filter to quickly update values.
00: disable quick update function.
01: 16 times.(default)
10: 32 times.
11: 48 times.
29
Description
Description
Description
July, 2007
F75387
0.27P